IRVING — With their Sept. 8 opener against the New York Giants looming, the Dallas Cowboys continue to make moves to shore up their struggling special teams.

The Cowboys on Sunday traded defensive lineman Sean Lissemore to San Diego and filled his roster spot by claiming linebacker/special-teams ace Kyle Bosworth off waivers from the Giants.

In exchange for Lissemore, the Chargers sent Dallas their 2015 seventh-round draft pick.

The trade was the second in as many days for the Cowboys. On Saturday, they acquired linebacker/special-teams stalwart Edgar Jones in a trade with Kansas City.

That deal also included Dallas collecting the Chiefs' seventh-round pick in 2014 in exchange for a sixth-round pick in 2014.

Sunday's trade came almost a year after the club signed Lissemore to a three-year, $7.17 million extension that is set to expire after the 2016 season.

A seventh-round pick in 2010, Lissemore fell out of favor in Dallas because he's not a good fit for Monte Kiffin's new 4-3 scheme and was outplayed by Nick Hayden, who was out of football last season after being cut by Cincinnati.

In San Diego, Lissemore will return to the 3-4 scheme he played in during his first three seasons with the Cowboys.

A Plano West graduate, Bosworth logged 25 games with Jacksonville after the Jaguars signed him as an undrafted rookie in 2010 out of UCLA.

The nephew of former Oklahoma star Brian Bosworth started five games for Jacksonville last season.

Dallas' special teams struggled throughout training camp and the preseason. The additions of Jones and Bosworth will help make up for the loss of linebacker/special-teams demon Alex Albright, whom the club placed on the waived/injured list after he underwent back surgery in training camp.

Also on Sunday, the Cowboys set their eight-man practice squad with players they released Saturday to reach the NFL's 53-player limit.